Tetracosactide is a synthetic peptide, which corresponds to the first 24 amino acids of the naturally occurring hormone ACTH (adrenocorticotropic hormone). It stimulates the adrenal cortex to produce corticosteroids, mineralocorticoids, and, to a lesser extent, androgens.

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Chemical Structure
ExplanationAbarelix is a synthetic decapeptide antagonist to gonadotropin releasing hormone (GnRH). It directly and competitively binds and blocks the gonadotropin releasing hormone receptors in the anterior pituitary, which inhibits the secretion and release of the luteinizing hormone (LH) and follicle stimulating hormone (FSH). For men, the inhibition of LH secretion prevents the release of testosterone. Therefore, it can relieve symptoms associated with prostate hypertrophy or prostate cancer.
Synonyms/AliasAbarelix;Abarelix-Depot-M;R-3827;R3827;R 3827; PPI149; PPI-149; PPI 149; R3827; R-3827; R 3827. Abarelix; Abarelix acetate. Brand name: Plenaxis.N-acetyl-3-(2-naphthyl)-D-alanyl-4-chloro-D-phenylalanyl-3-(3-pyridyl)-D-alanyl-L-seryl-N-methyl-L-tyrosyl-D-asparagyl-L-leucyl-N6-isopropyl-L-lysyl-L-prolyl-D-alaninamide
Chemical Name(2R)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2R)-2-[[(2R)-2-acetamido-3-naphthalen-2-ylpropanoyl]amino]-3-(4-chlorophenyl)propanoyl]amino]-3-pyridin-3-ylpropanoyl]amino]-3-hydroxypropanoyl]-methylamino]-3-(4-hydroxyphenyl)propanoyl]amino]-N-[(2S)-1-[[(2S)-1-[(2S)-2-[[(2R)-1-amino-1-oxopropan-2-yl]carbamoyl]pyrrolidin-1-yl]-1-oxo-6-(propan-2-ylamino)hexan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]butanediamide
SequenceOne Letter Code: XXXSYNLXPA
Three Letter Code: Ac-D-2Nal-D-Phe(4-Cl)-D-3Pal-Ser-N(Me)Tyr-D-Asn-Leu-Lys(iPr)-Pro-D-Ala-NH2
ApplicationHormone antagonist and an antineoplastic agent
AppearanceSolid powder
Biological ActivityAbarelix is a polypeptide compound composed of ten natural and non-natural amino acid resiudes in a linear sequence. It has a role as a hormone antagonist and an antineoplastic agent.
TargetGonadotropin-releasing hormone receptor
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